Year	Units
1960-01-01	67216.6271271820
1961-01-01	62021.7041563591
1962-01-01	65522.8102059850
1963-01-01	84215.5820395678
1964-01-01	99416.2654823774
1965-01-01	93723.2838536160
1966-01-01	88959.4550740648
1967-01-01	93241.0895955112
1968-01-01	93257.2044858687
1969-01-01	82448.2044012469
1970-01-01	91614.3206378221
1971-01-01	109102.5670398170
1972-01-01	138843.2234207810
1973-01-01	137398.6445706570
1974-01-01	103036.5215244390
1975-01-01	98733.9292958437
1976-01-01	106751.7969718200
1977-01-01	109656.6520782210
1978-01-01	131873.2411022440
1979-01-01	142363.2832533670
1980-01-01	126853.2440137990
1981-01-01	124790.5380480470
1982-01-01	132286.3834726520
1983-01-01	150796.4642176230
1984-01-01	146891.5674438070
1985-01-01	153800.3465777220
1986-01-01	157237.4105501250
1987-01-01	168351.3410989190
1988-01-01	184536.3688029920
1989-01-01	192460.2190357440
1990-01-01	167411.1666666670
1991-01-01	132693.8333333330
1992-01-01	132800.0000000000
1993-01-01	148202.1666666670
1994-01-01	159244.4166666670
1995-01-01	162113.8333333330
1996-01-01	168787.5000000000
1997-01-01	180893.7500000000
1998-01-01	187283.5833333330
1999-01-01	183134.5833333330
2000-01-01	185139.1666666670
2001-01-01	204897.4166666670
2002-01-01	213635.9166666670
2003-01-01	214920.8333333330
2004-01-01	213939.0833333330
2005-01-01	203309.7500000000
2006-01-01	195405.3333333330
2007-01-01	200333.9166666670
2008-01-01	177649.5833333330
2009-01-01	166249.9166666670
2010-01-01	169237.1666666670
2011-01-01	161771.0833333330
2012-01-01	170384.0833333330
2013-01-01	188728.0833333330
2014-01-01	206369.5833333330
2015-01-01	219458.5833333330
2016-01-01	224398.8333333330
2017-01-01	211718.0833333330